from flask import abort
from flask import current_app, jsonify
from flask import g
from flask import render_template
from flask import request

from info import constants, db
from info.models import News, Comment, CommentLike, User
from info.modules.news import news_blu
from info.utils.common import user_login_data
from info.utils.response_code import RET


@news_blu.route('/followed_user', methods=["POST"])
@user_login_data
def followed_user():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="未登录")
    user_id = request.json.get("user_id")
    action = request.json.get("action")
    if not all([user_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in("follow", "unfollow"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        other = User.query.get(user_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")
    if not other:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")
    if action == "follow":
        if other not in user.followed:
            user.followed.append(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户已被关注")
    else:
        if other in user.followed:
            user.followed.remove(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户未被关注")
    return jsonify(errno=RET.OK, errmsg="操作成功")



@news_blu.route('/comment_like', methods=['POST'])
@user_login_data
def comment_like():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户未登陆')
    comment_id = request.json.get('comment_id')
    # news_id = request.json.get('news_id')
    action = request.json.get('action')
    if not all([comment_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    if action not in ["add", "remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        comment_id = int(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='查询失败')
    if not comment:
        return jsonify(errno=RET.NODATA, errmsg='评论不存在')

    try:
        comment_like_model = CommentLike.query.filter(CommentLike.comment_id == comment_id, CommentLike.user_id == user.id).first()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='查询失败')
    if action == 'add':
        if not comment_like_model:
            comment_like_model = CommentLike()
            comment_like_model.comment_id = comment_id
            comment_like_model.user_id = user.id
            db.session.add(comment_like_model)
            comment.like_count += 1
    else:
        if comment_like_model:
            db.session.delete(comment_like_model)
            comment.like_count -= 1
    try:
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库操作失败")
    return jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route('/news_comment', methods=['POST'])
@user_login_data
def news_comment():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='请登录')
    news_id = request.json.get('news_id')
    content = request.json.get('content')
    parrent_id = request.json.get('parrent_id')
    if not all([news_id, content]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    try:
        news_id = int(news_id)
        if parrent_id:
            parrent_id = int(parrent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='查询失败')
    if not news:
        return jsonify(errno=RET.NODATA, errmsg='没有要找的新闻')
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news.id
    comment.content = content
    if parrent_id:
        comment.parent_id = parrent_id
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
    return jsonify(errno=RET.OK, errmsg='OK', data=comment.to_dict())


@news_blu.route('/news_collect', methods=['POST'])
@user_login_data
def news_collect():
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='请登录')
    news_id = request.json.get('news_id')
    action = request.json.get('action')
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    if action not in ["collect", "cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据查询失败')
    if not news:
        return jsonify(errno=RET.NODATA, errmsg='没有要找的新闻')
    if action == 'collect':
        if news not in user.collection_news:
            user.collection_news.append(news)
    else:
        if news in user.collection_news:
            user.collection_news.remove(news)
    return jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    user = g.user
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据查询失败')
    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_basic_dict())
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
    if not news:
        abort(404)
    news.clicks += 1
    is_collected = False
    if user:
        if news in user.collection_news:
            is_collected = True
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)
    comment_like_ids = []
    if user:
        try:
            comment_ids = [comment.id for comment in comments]
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids), CommentLike.user_id == user.id).all()
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)
    comments_dict_list = []
    for comment in comments:
        comment_list = comment.to_dict()
        comment_list['is_like'] = False
        if comment.id in comment_like_ids:
            comment_list['is_like'] = True
        comments_dict_list.append(comment_list)
    is_followed = False
    if news.user and user:
        if news.user in user.followed:
            is_followed = True
    data = {
        'user': user.to_dict() if user else None,
        'news_dict_list': news_dict_list,
        'news': news.to_dict(),
        'is_collected': is_collected,
        'is_followed': is_followed,
        'comments': comments_dict_list
    }
    return render_template('news/detail.html', data=data)
